The Israel Air Force bombed targets in the Gaza Strip throughout the day on Friday, killing four PRC activists, a day after coordinated terror attacks killed eight Israelis.

Meanwhile, Palestinian attacks on Israel continued, firing 30 Grad and Qassam rockets into south Israel over the course of Friday afternoon. Most fell in open areas and Iron Dome was used to intercept a rocket aimed at the port city of Ashdod.

Smoke rises after an explosion in a smuggling tunnel along the borders between Rafah and Egypt, in the southern Gaza Strip April 8, 2011.Reuters

The IDF spokesman's office said in a statement that Israeli planes targeted weapon manufacturing centers in central Gaza Strip and two more sites in the north and south. "The IDF will not tolerate any attempt to harm Israeli citizens and IDF soldiers," the statement read," and will continue to operate resolutely against anyone who terrorizes Israel. The Hamas terrorist organization is the address, and it bears the responsibility."

Later in the evening, the IAF bombed another three targets, successfully hitting two Popular Resistance Committee activists attempting to perpetrate rocket attacks against Israel. An additional two PRC activists were killed in the center of the strip.

Samed Abdul Mu'ty Abed, a 25-year-old PRC official was killed in one of the strikes while riding a motorcycle in northern Gaza.

On Thursday, night IAF planes bombed central Gaza, hitting a power plant and causing a power outage in the Nuseirat refugee camp.

The terror attack along the Israeli-Egyptian border on Thursday was planned in the Gaza Strip by the PRC and perpetrated by terrorists who crossed from Gaza into Sinai via smuggling tunnels. They then traveled some 200 kilometers to reach an area of the border protected only by a tattered wire fence, about 15 kilometers north of Eilat.

Israeli forces killed five of the terrorists, and Egyptian soldiers reportedly killed two more. But the Israel Defense Forces estimates that 15 to 20 participated in the attack, meaning most escaped.

IDF officials believe the goal of the attack was to kidnap a soldier. The IDF had previously responded to warnings of a planned attack, beefing up its forces in the area.

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